Dealing with Social Anxiety in High School

so like im actually in high school (im in year 10, im british) and i struggle with alot of things due to my social anxiety. i hate speaking in front of the class because im scared that i said something "too weirdly" or that i did something wrong, and my stuttering doesnt really help. ive had it since i was 7 and its ome of my huge insecurities. i dont actually know how to stop stuttering, what ever i do just doesnt work. if anyone knows any thing about how to stop or reduce the stuttering then please let me know because i think thats what's stopping me from making new friends or talking to new people, i just get too scared to.